Java做while循环不循环

Question

我在做这个while循环时有点麻烦。 系统将打印出该行并停止。 我究竟做错了什么？ 感谢您的时间！

Scanner keyboard = new Scanner(System.in);

    String answer;
    int inputNum = 1;
    int countOdd = 0;
    int countEven = 0;

    do{
        do{
            System.out.println("Please enter an interger. When you are finished, enter 0.");
            inputNum = keyboard.nextInt();

                while (inputNum % 2 == 0)
                    countOdd++;
                while (inputNum % 2 != 0)
                    countEven++;
        }while(inputNum != 0);


        System.out.println("Thank you. The amount of odd intergers you entered is " 
        + countOdd + ". The amount of even intergers you entered is " + countEven);


        System.out.println("Thank you. The amount of odd intergers you entered is " 
        + countOdd + ". The amount of even intergers you entered is " + countEven);

        System.out.println("Would you like to run this program again? (Y) (N)");
        answer = keyboard.nextLine();

    }while (answer.equals("Y"));

    System.out.println("Thank you!");
}

}

Answer 1

由于inputNum在内部未更改，因此以下循环无法完成：

          while (inputNum % 2 == 0)
                countOdd++;
          while (inputNum % 2 != 0)
                countEven++;

您需要if语句而不是while语句。

Answer 2

你需要改变while与if 。 逻辑inputNum%2==0检查偶数是否为奇数。但是，如果您有意相反，则可以。 我按原样更改了它。

        Scanner keyboard = new Scanner(System.in);

    String answer;
    int inputNum = 1;
    int countOdd = 0;
    int countEven = 0;


        do{
            System.out.println("Please enter an interger. When you are finished, enter 0.");
            inputNum = keyboard.nextInt();

             if (inputNum % 2 == 0)
                 countEven++;
               if (inputNum % 2 != 0)
                   countOdd++;
        }while(inputNum != 0);


        System.out.println("Thank you. The amount of odd intergers you entered is " 
        + countOdd + ". The amount of even intergers you entered is " + countEven);

Answer 3

问题在于以下几行代码

while (inputNum % 2 == 0)
                countOdd++;
while (inputNum % 2 != 0)
                countEven++;

您不对if条件使用while语句。 改用这个

 if (inputNum % 2 == 0)
                    countOdd++;
 if (inputNum % 2 != 0)
                    countEven++;